Aggregation-induced emission (AIE) luminogens represent a paradigm shift in optoelectronic materials, turning aggregation—traditionally a detrimental factor for fluorophores—into an advantage. Their unique solid-state emissive behavior makes them particularly attractive for polymer-based applications where aggregation and restricted intramolecular motion can be harnessed to achieve enhanced optical responses. In the field of energy harvesting, AIE-active fluorophores have been incorporated into transparent polymer matrices to realize luminescent solar concentrators and colored photovoltaic panels [1]. By combining high photostability, large Stokes shifts, and tunable emission wavelengths, these materials overcome the limitations of conventional dyes, which often suffer from aggregation-caused quenching. Recent advances have demonstrated how careful molecular design and control over aggregation can boost quantum yields and optimize light guiding in plastic slabs and films, thereby facilitating their integration into sustainable building-integrated photovoltaics [2]. At the same time, AIEgens have opened new perspectives for chromogenic polymer systems capable of reporting structural, thermal, and mechanical changes. When dispersed in polymer matrices, their emission is modulated not only by molecular packing but also by variations in free volume, chain mobility, and microstructural integrity. This dual sensitivity enables the design of responsive polymers where optical readouts act as direct probes of aging, damage, or external stimuli. By distinguishing between genuine photophysical effects and scattering-induced artifacts, AIE-based probes provide reliable insight into polymer dynamics and durability [3]. Together, these developments illustrate how AIE luminogens bridge the domains of renewable energy and smart materials, establishing a versatile platform for next-generation luminescent devices and adaptive polymer technologies.